LinuxJedi's Conference Badge v2.0
Version 2.0 of my Conference Badge, currently running a modified version of the v1.0 software.
This has a completely custom PCB inside which uses an RP2040 microcontroller, battery charging circuit and OLED driver circuit. The firmware is also custom with a from-scratch OLED interface, using RP2040's DMA to talk to display.
It has a 900mAh battery inside the 3D printed case I designed. This runs it for ~12 hours.
The display is 128x128x16bpp, It is capable of ~70fps.